The supreme triumph of reason is to cast doubt upon its own validity.

The greatest height of heroism to which an individual, like a people, can attain is to know how to face ridicule.

Scholasticism, a concept which does not bear criticism, is a theological concept specifically designed to sustain faith in the immortality of the soul.

Science is a cemetery of dead ideas, even though life may issue from them.

My work...is to shatter the faith of men here, there, and everywhere, faith in affirmation, faith in negation, and faith in abstention from faith, and this for the sake of faith in faith itself.

Was man made for science, or was science made for man?

Piensa el sentimiento, siente el pensamiento." (roughly translated, "Think about the emotional and feel the intellectual")